variabilidade para caracteres morfológicos em mutantes de arroz variability for morphological traits in mutated rice

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ID: 158792
2005
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Abstract
O arroz é uma cultura amplamente cultivada em todo o mundo. Além da importância econômica e social, essa espécie possui atributos biológicos que a tornam modelo para a pesquisa básica. Nos últimos anos pelo menos três projetos de sequenciamento foram anunciados gerando informações valiosas. Mutantes constituem-se numa importante ferramenta para estudos de ação, função e regulação gênica. Este trabalho objetivou-se a mensurar o efeito da indução de mutação com Co60, sobre caracteres agronômicos em famílias M3 derivadas da cultivar BRS 7 "Taim". Sementes de 186 famílias e da cultivar BRS "Taim", foram semeadas no campo e avaliadas para estatura de planta, ciclo, número de panículas, número de afilhos e índice de afilhos férteis. Para a separação das famílias realizou-se uma análise multivariada e teste de agrupamento de médias, utilizando o método de Scott-Knott. Pela similaridade genética e o teste de Scott-Knott constatou-se variação entre famílias para todos os caracteres avaliados, sendo que três famílias (M3 149, M3 152 e M3 165) foram superiores para pelo menos quatro características.
Rice is a major worldwide-cultivated crop. Besides it's the economical and social importance, this species have biological features that make it a model for basic studies. In the last years at least three sequencing project were announced generating valuable information. Mutants may be a powerful tool to study gene action, function and regulation. The goal of this study was to measure radiation effects on agronomical traits M3 mutated families derived from the rice cultivar BRS 7 "Taim". Seeds from 186 M3 families and from the cultivar BRS 7 "Taim", were sowed in the field and evaluated for plant height, cycle, tiller number, panicle number and panicle per tiller. For genotype separation a multivariate analysis and the Scott-Knott test were performed. Genetic similarity and Scott-Knott tests have show a great variation among families for all traits evaluated, but three families (M(3)149, M(3)152 and M(3)165) were superior for at least four traits.
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Authors ;Andreza Figueirola Martins;Paulo Dejalma Zimmer;Antonio Costa de Oliveira;Fernando Irajá Félix de Carvalho;Eduardo Alano Vieira;Marcos Fontoura de Carvalho;Luís Fernando Martins;Filipa Stone da Fonseca
Journal information and software technology
Year 2005
DOI
10.1590/S1413-70542005000600016
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542005000600016
Keywords
mutation oryza sativa agronomical traitsagriculture (general)

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